ada63d56be
Remove test for function not having call chain guarding modref use in ref_maybe_used_by_call_p_1. It never made sense since modref treats call chain accesses explicitly. It was however copied from earlier check for ECF_CONST (which seems dubious too, but I would like to discuss it independelty). This enables us to detect that memory pointed to static chain (or parts of it) are unused by the function. lto-bootstrapped-regtested all lanugages on x86_64-linux. gcc/ChangeLog: 2021-11-19 Jan Hubicka <hubicka@ucw.cz> * tree-ssa-alias.c (ref_maybe_used_by_call_p_1): Do not guard modref by !gimple_call_chain. gcc/testsuite/ChangeLog: 2021-11-19 Jan Hubicka <hubicka@ucw.cz> * gcc.dg/tree-ssa/modref-dse-6.c: New test. |
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